Heating and ventilating apparatus



Oct. 23, 1928. 1,688,362

A. R. TEARE HEATING AND VENTILATING APPARATUS P iled Jan. 25, 1928 4 V atheism?? ity system. Accordingly,

` Patented Oct. 2, 19.28.

ALBERT K'TEAEE, or LAKEWOOD,

HEATING AND VENTLATING APPAEATS.' l

This invention relates to heating and -ventilating apparatus, particularly that which is intended for use in connection with the operation of a hot air heating furnace.'` In order to insure positive and uniform distri'V bution of air from the furnace through the Mvarious delivery pipes and into the rooms to be heated, it is` advantageous to utilize afan which is placed at or near the inlet to the 10 heating chamber of the furnace and to oper- OrdinarilyA walls of the inlet conduit so as to insure pase sage of air through'the heating chamber when the fan is -in operation. On the other hand, provision must be made for opening D the damper when the fan'is stopped so as to maintain the necessary flow of air throughthe heating chamber Unless provision is made for the free passage of air when the fan is stopped, the furnace will be .quickly burned out.

. The principal object of the present invention is to-provide an apparatus which includes a fan and damper which is placed adjacent the inlet to the heating chamber of a hot air furnace and is so arranged that the fan cannot bef started until the damper is moved to. closed position, and cannot be opend until the current to the fan lmotor is shut olf. When the fan is so stopped, the

damper -will then be automatically movedto open position.

vIn the drawings, Fig. 1 showsa part of a hotair furnace with an inlet conduitleading thereto, and having-my invention mounted therein; Fig. 2 isv a vertical transverse section taken through the inlet conduit on a plane indicated by the line 2-2 in Fig. 1;

Fig. 3 is a horizontal section taken through lane indicated by t e the apparatus on. a

IgA is a diagrammatic K line 3--3 in Fig. 2;

view showing switch anddamper arm when thefan is olf; and Fig. 5 is a similar view illustrating the relative position of these parts when the fan 1s on. y

For convenience of illustration, IO/indicates Dart of a heating chamber of a hot air furilace, hile 11 indicates a conduit through 'controlling the motor 31 is shown as being the relative position of the omo, AssIeNon 'ro JAMES c. MILES; or LAND, omo.

Applicamn med January as, 1928.` serii No. I2415,62?.

which air maybe led into the heatino cham-l ber. Within the conduit I have s own a frame 12 which is in the natureof a partition vextending across the conduit in a substantially vertical plane. The frame is illustrated vas having a .fan opening 1(5)' and damper openings 14:. A motor driven fan 15 is illustrated as being mounted adjacent the fan opening while dampers 16 are illustrated as beingmounted in the damper openings. While I have illustrated the frame as` having two damper openings, it is obvious that one opening would be suiiciently ade- J quate for purposes of my invention.

The dampers are arranged to be pivotally 7.@

.mounted upon-ahorizontal shaft 20, which may be supported entirely by the frame, although I have illustrated it as extending through one wall of the conduit asiat 21, and through the opposite wall as at 22. The

' dampers are rigidly mounted on the shaftand the shaft is arranged to be rotated, preferably by means outside the conduit. One form of apparatus' for accomplishing this is shown as an arm 25 which\is rigidly fastened to the shaft at a point outside the conduit, and is provided with a 'counterweight 26 for normally-holding the arm in upright position. At such time the dampers 16 are maintained in open position as indicated by the broken lines in Fig.- 4. The closed position of the arm and dampers is indicatedin Fig. 5. To prevent the'fan from being started until the `damper is closed, aswitch 30 for 90 mounted on the outer side of the conduit while' an arcuate arm 32 is illustrated as being carried by the arm 25 and as being inter-. posed in the path of movement of the switch arm 33. Thus, the arm 32 prevents the switch arm from being moved to closed posi- -tion so long as the dampers are open.

Hence, 'it is necessary to manually close the dampers bymovingthe arm 25 to the position shown 10c in Fig. 5. This movement causes the larm 32 to be moved out of the path of the switch arm, and thus permits the operatorto close the switch. f

`When the switch is closed, the end of the 101i arm 32 is in engagement with oneof the-` bars of the switc arm, wherefore the counterweight'26 cannot return the dampers to open position until the switch is opened.

The end of the arm 32 is suitably electri- 110` I I S.

not be stopped without the damper beingA 4cally insulated from the switch as indicated en the switch arm is moved toat 35; the open' position, the counterweight auto-I matically opens the damper as soon as the switch arm 33 clears the end of the damper arm.

n The wiring diagrams illustrated in Figs. 4 and 5 indicate a source of current supply at Jllgwith suitableleads which pass through the switch and are connected to the motor. With this arrangement, the fan cannot be started until the damper is closed, and the fan canopen. To this end, the counterweight is especially eavy to insure ositive opening of .the damper as soon as t e fan is stopped.

Thus, there is a manual closing of the damper when the fan is started, and an automatic opening of the same when the fan is stopped.

Accordingly, the danger ofthe damper remaining closed when the fan is shut Gif is eliminated, and an adequate circulation of air is thereby provided so as to prevent the furnace from burning out.

Having thus described my invention, I claim:

' 1. The combination of a heating chamber having an air inlet thereto, a fan and a damper associated with ,the inlet, an electric motor for operating the fan, a switch in the motor circuit, a member for actuating the damper, andmeans for preventing, closing of the switch until the member is moved a predetermined amount lin one direction.

2. In combination, with the heating chamber of a hot air furnace having an air inlet thereto, of a fan, a damper associated with an electric motor for operating the fan, a

circuit controller therefor, means for operating the damper, said means being rendered inoperative for moving the damper when said controller is in closed position.

4. In combination, a hot air conduit, a fan and a damper associated with the conduit, an

electric motor for opera-ting the fan, a circuit controller therefor, means for operating the damper, said means being rendered ino erative for moving the damper when said controller is in closed position, and said means being automatically rendered operable when the controller is moved to open position.

5. The combination with an air conduit, of a fan and a damper mounted within the conduit, an electric motor for operating the fan, a controller in circuit with the motor and mounted outside the conduit, an arm for operating the damper, and means coacting between the controller and arm for preventing the controller from being moved to closed position until the damper is closed, said means also acting to prevent opening of the C damper until the controller is moved to open position.

6.v The combination with the heating chamber of a hot air furnace having an air inlet conduit leading thereto, of a fan and a damper mounted within the conduit, an electric motor for operating the fan, a controller in the motor circuit, said controller being mounted outside the conduit and on one of the walls thereof, the damper being arranged to be swung about a pivot, there being an arm mounted outside the conduit to lbe turned with the damper, said arm having a portion thereof interposed in the path of movement of a controller andy functioning to prevent the controller from being closed so long as the damper is open, and said -controller functioning to prevent opening of the damper so long as the controller is closed.

In testimony signature.

ALBERT R. TEARE.

and arranged whereof, I hereunto aflix my 

